Destroy any contained value and construct a new one in place.
Declared in <bdlb_nullableallocatedvalue.h>
template<class... ARGS>
TYPE&
emplace(ARGS&&... args);Assign to this object the value of the (template parameter) TYPE created in place using the specified args and return a reference providing modifiable access to the underlying TYPE object. If this optional object already contains an object (`true == hasValue()`), that object is destroyed before the new object is created. Note that if the constructor of TYPE throws an exception this object is left in a disengaged state.
modifiable reference to the created value
| Name | Description |
|---|---|
| args | arguments forwarded to construct the contained value |